Vent for steam-pipes



(No Model.)

J.S.VBNS0N.

VENT FOR STEAM' PIPBS. No. 310,338.;Q Patented Jan. 6, 1885.

' a side view.

Unirse tirarse Parietti" Ormea,

JOHN S. VENSON, OF FOUR MILE, NEW' YORK.

VENT FOR STEAM-PEPS,

:JECIFICATEON forming part of Letters Patent No. 3l0,338, dated January 6, 1885.

Application filed July 3, 1881. (No model.)

To all whom zit may concern:

Be it known that I, JOHN S. VENSGN, a citizen of the United States of America, residing at Four Mile, in the county of Oattaraugus and State of New York, have invented certain new and useful Improvements in Vents for Steam- Pipes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to whiehit appertains to make and use the same, reference being had to the accompanying drawings, and to letters or ligures of reference marked thereon, which form a part of this specification.

rllhis invention relates to certain new and useful improvements' in vents for steam-pipes7 the object of my invention being to provide a means for allowing` the condensation ofsteam to escape automatically from the feedvpipe; and to this end my invention consists in the construction and combination of parts hereinafter fully described.

In the accompanying drawings, Figure l is Fig. 2 is a section, and Figs. 3 and 4 are detail views.

A represents a casting, preferably made of a single piece, and provided at one end on its exterior with a screw-threaded portion, c, by means of which it may be secured at a suitable point in the steam-conducting pipe B, which leads from the boiler, and is provided with a branch pipe which leads to the steam engine.

f The castingA, near the screw-threaded end a,

is provided with a valvesea't, c. which is formed at the end of the passage C, which is directly connected to a discharge opening or passage, G, the terminal portion of which passage is screw-threaded for the reception ot' a discharge-pipe through which the condensed moisture is conveyed. rlhe portionD of the casting Ais provided with an opening or passageway, D, which is connected to the passages G O/ by a smaller opening, d. The interior ofthe opening d is screw-threaded for the reception of a set-screw, E, which is locked in position by a nut, c, which passes over said setscrew and abuts against the end of the portion D ofthe casting, as shown, and prevents move ment of said set-screw when forced upon the same. The set-screw E, as shown in Figs. 2 and 4, is provided with a recessed end, which recess consists of a circular cutaway portion, j', having an opening, f', which extends to the base ol' the same. A valve, F, having a reduced end portion, F, with projecting flanges g, adapted to be placed so that its head or end will restupon the valve-seat a', is inserted in the end ot' the casting, as shown, and is retained in position within the opening C by means of a spiral spring, H, which is provided at one end with a hooked end which passes through an opening, g', in the end of the valve F, while the opposite end of said springis secured within the recess in the end of the setscrew E, the straight portion 7L of said spiral spring passing through the opening d in the casting. The end of the spiral spring is provided with a suitable head, which lies within the openingf within the set-screw, while the portion of the spring adjacent to the head will pass through the recess f. The spring I-I, which is connected, respectively, to' the setscrew and valve, will exert an outward pressure upon the valve F, and said pressure can be regulated by adjusting the set-screw.

The operation of my invention when applied to a steam-pipe is as follows: \Vhen steam is admitted to the pipe B, to which the connecting-pipe to the steam-engine is attached, the pressure within said pipe will force the valve F snugly upon its seat, and whenV the pressure or steam is cut off from said pipe the condensed steam or water will collect inthe lower portion of said pipe, to which my improved vent is is attached, and the Valve will be thrown from its seat by the spiral spring and allow the water to escape through the discharge-pipe.

By the means hereinbefore described I am enabled to provide an automatic vent which is effective in operation and simple in con struction, and which will always be open when there is no pressure within the supply-pipe, and which may be adjusted so as to open at different pressures, and which will also afford a means for admitting air to the steam-pipe, and thus preventing a vacuum therein.

I am aware that previous to my invention it has been proposed to arrange metallic strips in a steam-trap,which act thermostatically to force by their expansion a valve to close the dischargeopening, and by their consequent IOO contraction to remove the valve from said opening, but such device as contrasted with my improvement is uncertain in its operation, in that the heating or cooling of the metallic strip has to be relied upon to secure the necessary movements of the valve. In my improvement the quick and positive effect ofthe steampressure is the actual medium.

I claim- 1. The improved attachment herein described, consisting of a vent device having a portion for connection to the steam-supply circuit, and a discharge-opening, in combination With a valve interposed between said connecting portion and discharge, and adapted to be closed by pressure in the supply-circuit,

and automatically open When said pressure is removed, substantially as set forth.

2. The improved attachment herein de scribed, having` a portion for connection to the steam-supply circuit, and a discharge-opening, in combination with avalveinterposed between said connecting,` portion and discharge, to operate as described, and means for adjusting said valve, substantially as described.

3. rlhe improved vent for stcam-pipes,con sist-ing ofthe casting,` A, provided with a dis charge-opening, a passage-Way to one end of the same, and a valve located in one end ofthe opening, and provided with a spiral spring` which is attached to an adjusting means, snbstantially as shown, for the purpose set forth.

In testimony whereof I aflix my signature in presence of two Witnesses.

JOHN S. VENSON.

fitnessesz B. XV. JAMns, C. Il. SHULEn. 

